SIMATUPANG, O. Y.; SIMAMORA, B.; SITORUS, D. P. M. The Influence of the Problem Based Learning (PBL) Model on Learning Outcomes in Social Sciences Subjects ASEAN Class VIII UPTD SMP NEGERI 7 PEMATANG SIANTAR. International Journal of Global Sustainable Research, [S. l.], v. 1, n. 2, p. 283–292, 2023. DOI: 10.59890/ijgsr.v1i2.657. Disponível em: https://journal.multitechpublisher.com/index.php/ijgsr/article/view/657. Acesso em: 29 jun. 2026.